PROBLEM TO BE SOLVED: To provide a low carat gold alloy for casting whose gold color is thick and which has excellent mechanical properties.SOLUTION: A low carat gold alloy for casting includes 44-48 mass% of Au, 0-2 mass% of Pt, 3-5 mass% of Pd, 10-15 mass% of Cu, 0.01-0.3 mass% of Ir and/or Ru, and 0-1 mass% of Zn, with the balance comprising Ag.COPYRIGHT: (C)2013,JPO&INPIT【課題】金色が濃く、かつ機械的性質の優れる鋳造用低カラット金合金を提供する。【解決手段】Au:44~48mass%、Pt:0~2mass%、Pd:3~5mass%、Cu:10~15mass%、Ir及び/又はRu:0.01~0.3mass%、Zn:0~1mass%、残部がAgからなることを特長とする鋳造用低カラット金合金。【選択図】なし